在折叠式舱口盖中，开闭较方便的方式应为（）
A.钢索驱动式；
B.铰链式；
C.直接拉动式；
D.液压驱动式。
参考答案：D
She was seen ______ the theatre at that moment. [ ]
A. go into
B. to go into
C. went into
D. going into
